CN101368477A - Oil-water interface inspection and control method - Google Patents
Oil-water interface inspection and control method Download PDFInfo
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- CN101368477A CN101368477A CNA2008101498771A CN200810149877A CN101368477A CN 101368477 A CN101368477 A CN 101368477A CN A2008101498771 A CNA2008101498771 A CN A2008101498771A CN 200810149877 A CN200810149877 A CN 200810149877A CN 101368477 A CN101368477 A CN 101368477A
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Abstract
The invention discloses an oil-water interface test and control method, including the following steps: A, downhole operation: extracting brine and building a cavity through positive circulation technique, lowering an intermediate pipe to a fixed depth of the oil-water interface; B, ground operation: connecting the small valves on a brine extraction pipeline to a water inlet valve through a hose, so as to draw out oil-water mixture; C, oil-water interface testing: diesel oil and natural oil drops which float to the inner surface of an oil-water separating and testing device naturally diffuse and float on an extension slot to form an oil film, and when diesel oil precipitation is visible, the oil-water interface reaches the casing shoe of the intermediate pipe; D, oil-water interface depth control: with the enlarging of the cavity, injecting diesel oil to the downhole cavity periodically to form a stable oil pad layer; and E, oil-water interface depth adjustment: adjusting the depths of the intermediate pipe and the central pipe, extracting brine and building a cavity within the range of a new salt bed. The oil-water interface test and control method is simple and clear, reduces construction cost and improves production efficiency.
Description
Technical field
The present invention relates to underground water-soluble method mining (salt) technical field, more specifically relate to oil-water interface inspection and depth control method in a kind of underground water-soluble method mining (salt) oiling work progress, be applicable to that underground salt mine adopts halogen and make the chamber manufacturing process.
Background technology
Make in the process of chamber at the halogen of adopting that utilizes water-soluble method recovery of subterranean salt mine, there are a kind of three pipes to adopt halogen and make chamber technology and method: pass through boring method, get out the bottom of the pit shaft of certain size to salt deposit, set up the passage of ground to subterraneous salt deposit, be lowered to production casing to the salt deposit top and use cement to cement the well, and then being lowered to intervalve and central tube salt layer depth to the design exploitation, the beginning water filling is adopted halogen and is made the chamber and produce.By the central tube water filling, the manufacturing process of the annular space extraction bittern of central tube and intervalve is called the direct circulation water injection technology, and on the contrary, by the annulus water injection of central tube and intervalve, the manufacturing process of central tube extraction bittern is called anti-circulation water injection technology.
In order to control the concentration that bittern produces and the development of cavity geometry, usually use diesel oil as resistance solvent, annular space by production casing and intervalve is injected in the cavity of salt cave, utilize the density contrast between diesel oil and the bittern, form the diesel oil topping at cavity top, salt cave, form metastable oil-water interfaces, in certain production cycle the prevention cavity on molten, cavity geometry development is controlled in the salt deposit of design, guarantees to adopt halogen and make the chamber activity in production and normally carry out; When the cavity radius rises to the size of design, by readjusting intervalve, central tube and the oil-water interfaces degree of depth, can in new salt deposit scope, adopt halogen again and make chamber production, thereby on the basis of improving the salt deposit coefficient of mining, the developing direction that makes salt cave cavity controlled and orderly in carry out, the stable cavity geometry of final formation prevents the environmental disruption hidden danger that cavity collapses and brings, and is convenient to the comprehensive utilization of the salt cave cavity of making.
This shows that the depth detection of oil-water interfaces and control are to guarantee to adopt the key technology that halogen is made each stage ordinary production of chamber.At present the most frequently used a kind of technology and method are to utilize the pulsed neutron log instrument to carry out the in-site measurement construction, after promptly each oiling construction, are lowered to the pulsed neutron log instrument by central tube and detect oil-water interfaces position in the cavity of salt cave.Make and need in the manufacturing process of chamber often oil-water interfaces to be detected and control owing to adopt halogen, use the site operation expense of pulsed neutron log method very expensive, and in measuring process, need to stop to adopt halogen and make the chamber and produce, reduced and adopted halogen and make chamber production timeliness.The present invention mainly is presented in and adopts halogen and make during the chamber produces a kind of oil-water interfaces depth detection and control method when adopting the direct circulation water injection technology.
Summary of the invention
The objective of the invention is to be to provide a kind of oil-water interface inspection and control method, more specifically provided the method for the oil-water interface inspection in a kind of underground water-soluble mining (salt) oiling work progress and degree of depth control, be applicable to that underground salt mine adopts halogen and make oil-water interfaces depth detection and control when adopting the direct circulation water injection technology in the manufacturing process of chamber.This method technological process is simple clearly, reliability is high, intuitive is strong, greatly reduces the on-the-spot construction cost that detects, and has improved production efficiency.
Make in the manufacturing process of chamber adopting halogen, especially make rising of chamber and establish the groove stage adopting halogen, usually adopt direct circulation water injection technology (Wang Qingming " Salt Deposit Solution Mining "), in this stage, because cavity volume is less, the cavity radius increases very fast, the pace of change of oil-water interfaces is also very fast, cell body is long-pending to be controlled in the salt deposit scope of design for cavity is built, need carry out the oiling construction continually, therefore, how to detect the oil-water interfaces degree of depth of each oiling construction effectively and oil-water interfaces are controlled in the depth bounds of design and seem particularly important, it is adopted halogen for whole cavity follow-up and makes the chamber and produce and lay a good foundation, and is to make the important assurance that carry out smoothly in the chamber.
The technical solution adopted for the present invention to solve the technical problems is:
The present invention cooperates a kind of oily-water seperating equipment to use, casing is connected with inside groove and at inlet valve of outside welding, inside groove is welded on box inside, the inside groove inboard has a downward water inlet bend pipe of the mouth of pipe to link to each other with inlet valve, and the top of inside groove is connected with extension slot, and vertical baffle plate is welded in the end of extension slot, vertical baffle plate is connected with hang plate, side at inside groove is installed stop valve, and the bottom of casing is the inclined plane, and the low side of casing is installed water discharging valve.The architectural feature of oily-water seperating equipment extremely helps being blended in separating out of diesel oil in the bittern, thereby is convenient to the constructor and observes.
A kind of oil-water interface inspection of the present invention and control method the steps include:
A, down-hole preparation: adopt the direct circulation water injection technology to adopt halogen and make the chamber, the oil-water interfaces degree of depth that intervalve is lowered to design control (generally makes progress 20-100m) from the salt deposit bottom, central tube is lowered to design and adopts the salt deposit bottom that halogen is made the chamber, make the fresh water amount of injecting from central tube keep stable, be convenient to calculate oil-water mixture from the intervalve pipe shoe degree of depth (general 20-100m) lagged times that return out ground upwards from the salt deposit bottom to guarantee discharging the stable of bittern flow velocity.Twice oiling of coarse analysis construction period, the recruitment of salt cave cavity and the variable quantity of oil-water interfaces, to determine the injection flow of this construction, injection flow is not generally waited by half cubic metre to several cubic metres (0.5-100 cubic metres) according to varying in size of salt cave cavity.
B, ground preparation: the minor valve that will be welded on row's halogen pipeline of ground wellhead assembly links to each other with inlet valve by flexible pipe, draws oil-water mixture, so that observe the situation of separating out of diesel oil near the water-oil separating verifying attachment the well head.After connecting flexible pipe, guarantee to close stop valve and water discharging valve, open inlet valve and minor valve then.Begin the oiling construction then, in batches in a small amount with the annular space injection down-hole salt cave cavity of diesel oil from production casing and intervalve.
The check of C, oil-water interfaces: along with the carrying out of oiling construction, oil-water interfaces arrive intervalve pipe shoe position the most at last, if continue to inject diesel oil, the diesel oil that excess is injected can return out ground with bittern.The micro-diesel oil and the natural oil droplet that float to rooved face in the water-oil separating verifying attachment can spread naturally on extension slot, flow, form the extremely thin oil film of one deck, under the refraction of natural light, on-the-spot oiling constructor is easy to just can observe the variation of diesel oil in the bittern.When having tangible diesel oil to separate out in the bittern that returns out well head, illustrate that oil-water interfaces have arrived the intervalve pipe shoe degree of depth, realized the check of oil-water interfaces, this oiling construction leaves it at that, and the bittern of emitting in the oily-water seperating equipment uses in order to next oiling construction.At this moment,, can extrapolate the diesel oil injection rate of each oiling construction, be convenient to the later halogen of adopting and make chamber production and oiling execution control by the diesel oil injection rate and the lagged time of observing diesel oil of site operation record.
The control of D, the oil-water interfaces degree of depth: along with the continuous increase of cavity, periodically inject diesel oil to the down-hole cavity, just oil-water interfaces can be controlled at the intervalve pipe shoe degree of depth (generally from salt deposit bottom upwards on 20-100m), form a metastable lubricating pad layer, realize stoping the last molten purpose of cavity, and on this degree of depth, form the top of salt cave cavity, and the cavity geometry development is controlled in the salt deposit of design, guarantee to adopt halogen and make the chamber activity in production and normally carry out.
The adjustment of E, the oil-water interfaces degree of depth: to rise to design size (general 30-100m) time when the radius of salt cave cavity, the degree of depth of readjusting intervalve and central tube (adjusts upward 10-50m) on former depth location, oil-water interfaces can be controlled on the degree of depth of intervalve of new adjustment, realize in new salt deposit scope, adopting halogen and made chamber production, thereby on the basis of improving the salt deposit coefficient of mining, the developing direction that makes salt cave cavity controlled and orderly in carry out, the stable cavity geometry of final formation prevents the environmental disruption hidden danger that cavity collapses and brings.
Major advantage of the present invention has: the oil-water interfaces characterization processes flow process of use is simple, clear and definite, reliability is high, and intuitive is strong; The on-the-spot checkout equipment that uses is simple and easy, easy to operate, greatly reduces the on-the-spot construction cost that detects; Can continue to adopt halogen in the testing process and make the chamber and produce, improve and adopted halogen and make chamber production efficiency.
Description of drawings
Accompanying drawing is the device connection diagram of a kind of oil-water interface inspection and control method.
Among the figure: 1-casing, 2-inlet valve, 3-water inlet bend pipe, 4-inside groove, 5-extension slot, 6-vertical baffle plate, 7-hang plate, 8-stop valve, 9-base A, 10-base B, 11-water discharging valve, 12-flexible pipe, 13-minor valve, 14-wellhead assembly, 15-production casing, 16-intervalve, 17-central tube, 18-oil-water interfaces, 19-bittern, 20-salt cave cavity.
Solid arrow is represented the flow direction of diesel oil among the figure, and dotted arrow is represented the flow direction of bittern.
The specific embodiment
The present invention cooperates a kind of oily-water seperating equipment to use, it is by casing 1, inlet valve 2, water inlet bend pipe 3, inside groove 4, extension slot 5, vertical baffle plate 6, hang plate 7, stop valve 8, base 9,10 and composition such as water discharging valve 11, its annexation is: casing 1 is connected with inside groove 4 and at inlet valve 2 of outside welding, inside groove 4 is welded on casing 1 inboard, the inboard of inside groove 4 has a downward water inlet bend pipe 3 of the mouth of pipe to link to each other with inlet valve 2, the top of inside groove 4 is connected with extension slot 5, vertical baffle plate 6 is welded in the end of extension slot 5, vertical baffle plate 6 is connected with hang plate 7, side at inside groove 4 is installed stop valve 8, the bottom of casing 1 is the inclined plane, and the low side of casing 1 is installed water discharging valve 11.The architectural feature of oily-water seperating equipment extremely helps being blended in separating out of diesel oil in the bittern, thereby is convenient to the constructor and observes.
Implement a kind of oil-water interface inspection of the present invention and control method, its concrete operations step is as follows:
A, down-hole preparation: adopt the direct circulation water injection technology to adopt halogen and make the chamber, with intervalve 16 be lowered to design control oil-water interfaces 18 degree of depth (generally from the salt deposit bottom upwards 20 26 or 31 38 or 42 49 or 53 55 or 59 66 or 70 75 or 81 89 or 94 or 100m), central tube 17 is lowered to design and adopts the salt deposit bottom that halogen is made the chamber, make the fresh water amount of injecting from central tube 17 keep stable, be convenient to calculate oil-water mixture returns out ground from the intervalve 16 pipe shoe degree of depth lagged time to guarantee discharging the stable of bittern flow velocity.Twice oiling of coarse analysis construction period, the recruitment of salt cave cavity 20 and the variable quantity of oil-water interfaces 18 are to determine the injection flow of this construction.Injection flow is not generally waited by half cubic metre to several cubic metres (0.5 or 0.9 or 1.6 or 2.1 or 5 or 9 or 13 or 16 or 21 or 29 or 34 or 38 or 46 or 53 or 59 or 66 or 75 or 82 or 90 or 95 or 100 cubic metres) according to varying in size of salt cave cavity.
B, ground preparation: the minor valve 13 that will be welded on row's halogen pipeline of ground wellhead assembly 14 links to each other with inlet valve 13 by flexible pipe 12, draws oil-water mixture, so as near the water-oil separating verifying attachment the well head situation of separating out of observation diesel oil.After connecting flexible pipe 12, guarantee to close stop valve 8 and water discharging valve 11, open inlet valve 2 and minor valve 13 then.Begin the oiling construction then, in batches in a small amount with the annular space injection down-hole salt cave cavity 20 of diesel oil from production casing 15 and intervalve 16.
The check of C, oil-water interfaces: along with the carrying out of oiling construction, oil-water interfaces 18 arrive intervalve 16 pipe shoe positions the most at last, if continue to inject diesel oil, the diesel oil that excess is injected can return out ground with bittern 20.The micro-diesel oil and the natural oil droplet that float to water-oil separating verifying attachment inside groove 4 surfaces can spread naturally on extension slot 5, flow, form the extremely thin oil film of one deck, under the refraction of natural light, on-the-spot oiling constructor is easy to just can observe the variation of diesel oil in the bittern.When having tangible diesel oil to separate out in the bittern that returns out well head, illustrate that oil-water interfaces 18 have arrived the intervalve 16 pipe shoe degree of depth, realized the check of oil-water interfaces, this oiling construction leaves it at that, and the bittern of emitting in the oily-water seperating equipment uses in order to next oiling construction.At this moment,, can extrapolate the diesel oil injection rate of each oiling construction, be convenient to the later halogen of adopting and make chamber production and oiling execution control by the diesel oil injection rate and the lagged time of observing diesel oil of site operation record.
The control of D, the oil-water interfaces degree of depth: along with the continuous increase of cavity, periodically inject diesel oil to the down-hole cavity, just oil-water interfaces 18 can be controlled on the intervalve 16 pipe shoe degree of depth (generally from the salt deposit bottom upwards 20 25 or 30 37 or 44 48 or 55 60 or 65 70 or 75 81 or 89 94 or 100m), form a metastable lubricating pad layer, realize stoping the last molten purpose of cavity, and on this degree of depth, form the top of salt cave cavity 20, cavity geometry development is controlled in the salt deposit of design, guarantees to adopt halogen and make the chamber activity in production and normally carry out.
E, the adjustment of the oil-water interfaces degree of depth: when the radius of salt cave cavity 20 rises to design size (general 30 or 36 40 or 46 82 or 58 64 or 71 78 or 83 90 or 96 or 100m), readjust intervalve 16 and central tube 17 the degree of depth (on former depth location, adjust upward 10 16 or 21 27 or 34 39 or 45 or 50m), oil-water interfaces 18 can be controlled on the degree of depth of intervalve of new adjustment, realize in new salt deposit scope, adopting halogen and made chamber production, thereby on the basis of improving the salt deposit coefficient of mining, the developing direction that makes salt cave cavity 20 controlled and orderly in carry out, the stable cavity geometry of final formation prevents the environmental disruption hidden danger that cavity collapses and brings.
Claims (1)
1. oil-water interface inspection and control method the steps include:
A, down-hole preparation: adopt the direct circulation water injection technology to adopt halogen and make the chamber, intervalve (16) is lowered to oil-water interfaces (18) degree of depth of design control, central tube (17) is lowered to design and adopts the salt deposit bottom that halogen is made the chamber, the fresh water amount of injecting from central tube (17) keeps stable to discharge the stable of bittern flow velocity, calculate oil-water mixture and return out the lagged time on ground, determine the injection flow of construction from intervalve (16) the pipe shoe degree of depth;
B, ground preparation: the minor valve (13) that will be welded on row's halogen pipeline of ground wellhead assembly (14) links to each other with inlet valve 13 by flexible pipe (12), draw oil-water mixture, on the water-oil separating verifying attachment of well head, observe the situation of separating out of diesel oil, after connecting flexible pipe (12), close stop valve (8) and water discharging valve (11), open inlet valve (2) and minor valve (13), beginning oiling construction is with the annular space injection down-hole salt cave cavity (20) of diesel oil from production casing (15) and intervalve (16);
C, the check of oil-water interfaces: along with the carrying out of oiling construction, oil-water interfaces (18) will arrive intervalve (16) pipe shoe position, if continue to inject diesel oil, the diesel oil that excess is injected can return out ground with bittern (20), the diesel oil and the natural oil droplet that float to water-oil separating verifying attachment inside groove (4) surface are gone up the nature diffusion at extension slot (5), flow, form one deck oil film, when having tangible diesel oil to separate out in the bittern that returns out well head, show that oil-water interfaces (18) have arrived intervalve (16) the pipe shoe degree of depth, realized the check of oil-water interfaces, this oiling construction leaves it at that;
The control of D, the oil-water interfaces degree of depth: along with the increase of cavity, periodically inject diesel oil to the down-hole cavity, oil-water interfaces (18) are controlled on intervalve (16) the pipe shoe degree of depth, form the lubricating pad layer, form the top of salt cave cavity (20) on the degree of depth, the cavity geometry development is controlled in the salt deposit of design;
The adjustment of E, the oil-water interfaces degree of depth: when the radius of salt cave cavity (20) rises to design size, readjust the degree of depth of intervalve (16) and central tube (17), oil-water interfaces (18) are controlled on the degree of depth of intervalve of new adjustment, in new salt deposit scope, adopt halogen and make chamber production, the developing direction of salt cave cavity (20) controlled and orderly in carry out, finally form stable cavity geometry.
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Cited By (9)
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| CN101749004B (en) * | 2009-12-25 | 2013-03-13 | 中国科学院地质与地球物理研究所 | Control method of interlayer rock salt cavern building with water solution in underground oil and gas storage |
| CN104040114A (en) * | 2012-01-03 | 2014-09-10 | 埃克森美孚上游研究公司 | Method for production of hydrocarbons using caverns |
| CN104265367A (en) * | 2014-07-24 | 2015-01-07 | 燕山大学 | Salt cavern gas storage cavity bottom communicated water discharge method |
| CN106679769A (en) * | 2016-12-30 | 2017-05-17 | 西南石油大学 | Liquid level monitoring device and a liquid level monitoring method |
| CN107100673A (en) * | 2017-04-21 | 2017-08-29 | 中国石油化工股份有限公司 | A kind of salt hole air reserved storeroom well makes cavity method |
| CN107764509A (en) * | 2016-08-16 | 2018-03-06 | 中国石油天然气股份有限公司 | Gas-water interface control simulation experiment system in cavity-making process of salt cavern gas storage |
| CN108222919A (en) * | 2016-12-12 | 2018-06-29 | 中国石油天然气股份有限公司 | Gas-water interface monitoring method applied to gas injection and brine discharge stage of salt cavern gas storage |
| CN109306862A (en) * | 2017-07-26 | 2019-02-05 | 江洁松 | Downhole separation system and submersible electric pump injection and extraction system based on super hydrophilic material |
| CN112814739A (en) * | 2021-01-12 | 2021-05-18 | 中国科学院武汉岩土力学研究所 | Method for repairing sealing performance of sleeve cement ring system of abnormal salt cavity of top plate |
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| DE1255333B (en) * | 1924-12-25 | 1967-11-30 | Deutsche Erdoel Ag | Device for determining the height of the contact surface between salt water and liquid gas in underground liquid gas storage facilities |
| US2787455A (en) * | 1955-03-29 | 1957-04-02 | Gulf Oil Corp | Method for developing cavities in salt or other soluble rock |
| US3632171A (en) * | 1970-02-04 | 1972-01-04 | Allied Chem | Method of controlling growth of brine wells |
| FR2731042B1 (en) * | 1995-02-28 | 1997-04-25 | Geostock Societe Francaise De | PROCESS FOR GASTING A SALT CAVITY |
| CN100337011C (en) * | 2003-08-29 | 2007-09-12 | 化工部长沙设计研究院 | Method for extracting mirabilite ore deposit by using drilling water soluble oil pad process |
| CN100379938C (en) * | 2004-09-21 | 2008-04-09 | 化工部长沙设计研究院 | Well drilling and water dissolving process for sodium sulfate hydrate |
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| CN101749004B (en) * | 2009-12-25 | 2013-03-13 | 中国科学院地质与地球物理研究所 | Control method of interlayer rock salt cavern building with water solution in underground oil and gas storage |
| CN104040114A (en) * | 2012-01-03 | 2014-09-10 | 埃克森美孚上游研究公司 | Method for production of hydrocarbons using caverns |
| CN104265367A (en) * | 2014-07-24 | 2015-01-07 | 燕山大学 | Salt cavern gas storage cavity bottom communicated water discharge method |
| CN107764509A (en) * | 2016-08-16 | 2018-03-06 | 中国石油天然气股份有限公司 | Gas-water interface control simulation experiment system in cavity-making process of salt cavern gas storage |
| CN108222919A (en) * | 2016-12-12 | 2018-06-29 | 中国石油天然气股份有限公司 | Gas-water interface monitoring method applied to gas injection and brine discharge stage of salt cavern gas storage |
| CN108222919B (en) * | 2016-12-12 | 2021-08-03 | 中国石油天然气股份有限公司 | Gas-water interface monitoring method applied to gas injection and brine discharge stage of salt cavern gas storage |
| CN106679769A (en) * | 2016-12-30 | 2017-05-17 | 西南石油大学 | Liquid level monitoring device and a liquid level monitoring method |
| CN106679769B (en) * | 2016-12-30 | 2019-03-22 | 西南石油大学 | A kind of level monitoring device and a kind of level monitoring method |
| CN107100673A (en) * | 2017-04-21 | 2017-08-29 | 中国石油化工股份有限公司 | A kind of salt hole air reserved storeroom well makes cavity method |
| CN109306862A (en) * | 2017-07-26 | 2019-02-05 | 江洁松 | Downhole separation system and submersible electric pump injection and extraction system based on super hydrophilic material |
| CN112814739A (en) * | 2021-01-12 | 2021-05-18 | 中国科学院武汉岩土力学研究所 | Method for repairing sealing performance of sleeve cement ring system of abnormal salt cavity of top plate |
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| CN101368477B (en) | 2011-08-17 |
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Inventor after: Yang Chunhe Inventor after: Qu Danan Inventor after: Li Yinping Inventor after: Shi Xilin Inventor before: Qu Danan Inventor before: Yang Chunhe Inventor before: Li Yinping Inventor before: Shi Xilin |
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